Newmar Mountain Aire 4551
Still in production. A used 2023 would run roughly $546,400.
A missing row means the maker never published that figure: unknown, not zero.
- 1× king bed(Permanent)—
- 1× convertible dinette(Convertible)—
- 1× sofa sleeper(Convertible)—
Newmar (Better tier): Newmar Mountain Aire
| YEARS | GVWR | DRY | MSRP |
|---|---|---|---|
| 2019–23 | 54,000 lb | 45,300 lb | $926,036 |
| 2024– | 54,000 lb | 44,200 lb | $926,036 |
- 2019Introduced
- 2020Grey capacity 65 to 80 gal, black 45 to 60 gal
- 2024Engine rating raised from 500 to 525 hp; wheelbase went to 318"+tag then back to 294"+tag
- 2027MSRP $926,036 - the most expensive Mountain Aire
Patient search: weeks of watching, and probably some travel. Why: 8-year production run; still in production; priced at the top of its maker’s range. Estimated from build volume and production span, not a count of live listings.
The flagship 45-foot Mountain Aire, in the lineup continuously since 2019 - bath and a half, tag axle, the full-size coach.
Live listings for the 4551 on the big marketplaces. Each search opens pre-filled with this exact floorplan:
Inventory varies by site and day. Slim pickings? search the whole Mountain Aire line ↗
These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.
See where it ranks for you →Data compiled from manufacturer spec sheets, retrieved 2026-07.